A system and method are provided for creating location-based user networks. In general, a proximity group including a number of users is identified. Each user in the proximity group is within a proximate area of at least one other user in the proximity group and has an area of interest. The areas of interest of the users in the proximity group are aggregated to provide an aggregate area of interest for the proximity group. Other users within the aggregate area of interest are identified as neighbors of each of the users in the proximity group. Once the neighbors are identified, each of the users in the proximity group may use the neighbors as members, or potential members, for a user network.